If you're finding it difficult to service/repair your
car, get one of those online manuals. You'll not have to wait for others to answer, or rely on mechanics and all. Plus I know a website that has very good manuals online, without expiry i.e. for lifetime.www.reliable-store.com

Here is a picture of the switch. Apparently there is only an oil light in the vehicle, so it is a switch and not a "sensor". The second picture shows the engine. The marked "F" is the location of the switch.

the antenna is located in the roof and front fender have included a link to a schematic (basic location) , if not getting a good reception the best solution is to get an aftermarket fit antenna that mounts on the vehicle body because to try and replace this factory fitted antenna would be prohibitively costly Antenna Amplifier in Electrical Lighting and Body Mobile Multi media...